Add progressive web app companion for cross-platform access
Vite + TypeScript PWA that mirrors the Android app's core features: - Pre-processed shelter data (build-time UTM33N→WGS84 conversion) - Leaflet map with shelter markers, user location, and offline tiles - Canvas compass arrow (ported from DirectionArrowView.kt) - IndexedDB shelter cache with 7-day staleness check - Service worker with CacheFirst tiles and precached app shell - i18n for en, nb, nn (ported from Android strings.xml) - iOS/Android compass handling with low-pass filter - Respects user map interaction (no auto-snap on pan/zoom) - Build revision cache-breaker for reliable SW updates Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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pwa/node_modules/leaflet.offline/examples/list-storage/index.html
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pwa/node_modules/leaflet.offline/examples/list-storage/index.html
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<!doctype html>
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<html lang="en">
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<head>
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<meta charset="UTF-8" />
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<link rel="icon" type="image/svg+xml" href="/vite.svg" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<title>Storage</title>
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</head>
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<body>
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<div class="container-fluid py-md-3">
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<main id="app">
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<h1>List files in storage</h1>
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<div class="form-row">
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<div class="form-group col-md-6">
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<label for="selectlayer">Select layer:</label>
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<select class="form-control" id="selectlayer"></select>
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</div>
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</div>
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<p>
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Total <span id="storage"></span>
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<button class="btn btn-danger" id="remove_tiles">
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<i
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class="fa fa-trash"
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aria-hidden="true"
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title="Remove all tiles from all layers"
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></i>
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All
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</button>
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<button class="btn btn-warning" id="remove_old_tiles">
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<i
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class="fa fa-archive"
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aria-hidden="true"
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title="Remove old osm tiles"
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></i>
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Old
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</button>
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</p>
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<table class="table table-striped table-sm table-fixed">
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<colgroup>
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<col style="width: 50px" />
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<col />
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<col />
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<col style="width: 100px" />
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</colgroup>
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<thead>
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<tr>
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<th></th>
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<th>Source url</th>
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<th>Storage key</th>
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<th>Bytes</th>
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</tr>
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</thead>
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<tbody id="tileinforows"></tbody>
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</table>
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</main>
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</div>
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<script type="module" src="/src/main.ts"></script>
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</body>
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</html>
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pwa/node_modules/leaflet.offline/examples/list-storage/package-lock.json
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pwa/node_modules/leaflet.offline/examples/list-storage/package-lock.json
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pwa/node_modules/leaflet.offline/examples/list-storage/package.json
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pwa/node_modules/leaflet.offline/examples/list-storage/package.json
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{
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"name": "list-storage",
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"private": true,
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"version": "0.0.0",
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"type": "module",
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"scripts": {
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"dev": "vite",
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"build": "tsc && vite build",
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"preview": "vite preview"
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},
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"devDependencies": {
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"idb": "^8.0.0",
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"leaflet": "^1.9.4",
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"leaflet.offline": "^3.1.0",
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"prettier": "^3.3.3",
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"typescript": "~5.6.2",
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"vite": "^6.3.5"
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},
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"dependencies": {
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"@fortawesome/fontawesome-free": "^7.1.0"
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}
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}
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pwa/node_modules/leaflet.offline/examples/list-storage/public/vite.svg
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pwa/node_modules/leaflet.offline/examples/list-storage/public/vite.svg
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<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" class="iconify iconify--logos" width="31.88" height="32" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 257"><defs><linearGradient id="IconifyId1813088fe1fbc01fb466" x1="-.828%" x2="57.636%" y1="7.652%" y2="78.411%"><stop offset="0%" stop-color="#41D1FF"></stop><stop offset="100%" stop-color="#BD34FE"></stop></linearGradient><linearGradient id="IconifyId1813088fe1fbc01fb467" x1="43.376%" x2="50.316%" y1="2.242%" y2="89.03%"><stop offset="0%" stop-color="#FFEA83"></stop><stop offset="8.333%" stop-color="#FFDD35"></stop><stop offset="100%" stop-color="#FFA800"></stop></linearGradient></defs><path fill="url(#IconifyId1813088fe1fbc01fb466)" d="M255.153 37.938L134.897 252.976c-2.483 4.44-8.862 4.466-11.382.048L.875 37.958c-2.746-4.814 1.371-10.646 6.827-9.67l120.385 21.517a6.537 6.537 0 0 0 2.322-.004l117.867-21.483c5.438-.991 9.574 4.796 6.877 9.62Z"></path><path fill="url(#IconifyId1813088fe1fbc01fb467)" d="M185.432.063L96.44 17.501a3.268 3.268 0 0 0-2.634 3.014l-5.474 92.456a3.268 3.268 0 0 0 3.997 3.378l24.777-5.718c2.318-.535 4.413 1.507 3.936 3.838l-7.361 36.047c-.495 2.426 1.782 4.5 4.151 3.78l15.304-4.649c2.372-.72 4.652 1.36 4.15 3.788l-11.698 56.621c-.732 3.542 3.979 5.473 5.943 2.437l1.313-2.028l72.516-144.72c1.215-2.423-.88-5.186-3.54-4.672l-25.505 4.922c-2.396.462-4.435-1.77-3.759-4.114l16.646-57.705c.677-2.35-1.37-4.583-3.769-4.113Z"></path></svg>
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After Width: | Height: | Size: 1.5 KiB |
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pwa/node_modules/leaflet.offline/examples/list-storage/src/main.ts
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pwa/node_modules/leaflet.offline/examples/list-storage/src/main.ts
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import './style.css';
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import { getStorageInfo, removeTile, truncate } from 'leaflet.offline';
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export const urlTemplate = 'https://tile.openstreetmap.org/{z}/{x}/{y}.png';
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export const wmtsUrlTemplate =
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'https://service.pdok.nl/brt/achtergrondkaart/wmts/v2_0?service=WMTS&request=GetTile&version=1.0.0&tilematrixset=EPSG:3857&layer={layer}&tilematrix={z}&tilerow={y}&tilecol={x}&format=image%2Fpng';
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const layerSelector = document.getElementById(
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'selectlayer',
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) as HTMLSelectElement;
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function createLayerOpts() {
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const xyzOpt = document.createElement('option');
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xyzOpt.value = urlTemplate;
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xyzOpt.text = 'osm';
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const wmtsOpt = document.createElement('option');
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wmtsOpt.value = wmtsUrlTemplate;
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wmtsOpt.text = 'wmts api layer';
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layerSelector.add(xyzOpt);
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layerSelector.add(wmtsOpt);
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layerSelector.value = urlTemplate;
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}
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const createTable = (url: string) =>
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getStorageInfo(url).then((r) => {
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document.getElementById('storage')!.innerHTML = r.length.toString();
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const list = document.getElementById(
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'tileinforows',
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) as HTMLTableSectionElement;
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list.innerHTML = '';
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for (let i = 0; i < r.length; i += 1) {
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const tileInfo = r[i];
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list.insertAdjacentHTML(
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'beforeend',
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`<tr>
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<td>${i}</td>
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<td class="text-truncate">${tileInfo.url}</td>
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<td class="text-truncate">${r[i].key}</td>
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<td>${tileInfo.blob.size}</td>
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</tr>`,
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);
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}
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});
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createLayerOpts();
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createTable(layerSelector.value);
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const rmButton = document.getElementById('remove_tiles') as HTMLButtonElement;
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rmButton.addEventListener('click', () =>
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truncate().then(() => createTable(layerSelector.value)),
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);
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const rmOldButton = document.getElementById(
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'remove_old_tiles',
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) as HTMLButtonElement;
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rmOldButton.addEventListener('click', async () => {
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const tiles = await getStorageInfo(urlTemplate);
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const minCreatedAt = new Date().setDate(-30);
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await Promise.all(
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tiles.map((tile) =>
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tile.createdAt < minCreatedAt ? removeTile(tile.key) : Promise.resolve(),
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),
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);
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createTable(layerSelector.value);
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});
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layerSelector.addEventListener('change', (e) => {
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// @ts-ignore
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createTable(e.target.value);
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});
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pwa/node_modules/leaflet.offline/examples/list-storage/src/style.css
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@import 'leaflet/dist/leaflet.css';
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@import '/node_modules/@fortawesome/fontawesome-free/css/all.min.css';
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body {
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margin: 0;
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font-family: sans-serif;
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}
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#app {
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height: 100vh;
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max-width: 1200px;
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margin: 0 auto;
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}
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.btn-danger {
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--background-color: red;
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--foreground-color: white;
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}
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.btn-warning {
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--background-color: orange;
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--foreground-color: white;
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}
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.btn {
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border: var(--background-color) 1px solid;
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background-color: var(--background-color);
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color: var(--foreground-color);
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padding: 0.5em;
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}
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.table-striped {
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td {
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padding: 0.5em;
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}
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tr:nth-child(even) {
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background-color: #f2f2f2;
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}
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}
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pwa/node_modules/leaflet.offline/examples/list-storage/src/vite-env.d.ts
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/// <reference types="vite/client" />
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pwa/node_modules/leaflet.offline/examples/list-storage/tsconfig.json
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pwa/node_modules/leaflet.offline/examples/list-storage/tsconfig.json
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{
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"compilerOptions": {
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"target": "ES2020",
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"useDefineForClassFields": true,
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"module": "ESNext",
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"lib": ["ES2020", "DOM", "DOM.Iterable"],
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"skipLibCheck": true,
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/* Bundler mode */
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"moduleResolution": "Bundler",
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"allowImportingTsExtensions": true,
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"isolatedModules": true,
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"moduleDetection": "force",
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"noEmit": true,
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/* Linting */
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"strict": true,
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"noUnusedLocals": true,
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"noUnusedParameters": true,
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"noFallthroughCasesInSwitch": true,
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"noUncheckedSideEffectImports": true
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},
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"include": ["src"]
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}
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